Improvement in molds for casting flanged pipe



UNITED STATES PATENT OFFICE.

IMPROVEMENT IN MOLDS FOR CASTING FLANGED PIPE.

Specication forming part of Letters Patent No. 53,690, dated April 3, 1866.

Which- Figure l is a longitudinal central section of one joint or length of the common anged pipe, and Fig. 2 is an end view of the same. Fig. 3 is a side elevation of the pattern required to form the mold in which flanged pipe is cast by my improved method, and Fig. 4 is an end vien7 ot' Fig. 3. Fig. 5 is a plan of one-halt` ofthe pattern, the end of which is shown in Fig. 6. Fig. 7 represents the face side of a pair of the squaring-blocks which are used in connection with the mold to form square ends to the pipe. Fig. 8 is an end view, and Fig. 9 a central edge view, of Fig. 7.

The object of my invention is to avoid the necessity ot turning or finishing the ends of anged pipes or drilling` the holes for bolts which hold said pipes together.

I construct my pipe-pattern of any size or length desired, with center prints, A, projecting from each end, by which impressions are made in the mold for the reception of the center core, which forms the interior of the pipe, as usual.

To avoid the necessity of squaring or finishing the ends of the Banged pipe H Hor drilling the bolt-holes a through the anges g of the same, Ihave invented the following method of casting said ianged pipes: First, by providing squaring-prints B B, which are tted onto the center prints, A A, and against the flanged ends C C of the pattern, and secured thereto; second, by providing squaring-blocks D D, Figs. 7, 8, and 9, which are ot' the same size and form of the prints B B, and byinserting cores f f in holes c, .made through the substance of the blocks D D, to receive them, said cores projecting from theface side ofthe blocks D D asufcient distance to correspond with the thickness ofthe iian ged ends C C ofthe pattern. The pattern is molded and drawn from the mold in the ordinary Way, and the squaring-blocks D D, with cores f projectin g from their face sides, are set in the mold in cavities formed by the squaring-printsBB Thecentercoreisthenset in the mold with its ends resting in cavities formed by the center prints, AA, and in similar openings or bearings E, made in the central edges of the blocksD D. The mold is then closed and filled with melted metal, which flows through the interior of the mold against the squaring-blocks D D around the center core and the cores f, and forms a iianged pipe, with the ends squared and finished and the bolt-holes cast, all at the same operation.

The cores f may be of sand or metal and fitted to the holes cin the blocks D D, said cores being slightly tapering from the face of said blocks to their projecting ends, so as to be easily removed from the casting.

The squaring-blocks D D may be made ot' metal or of the ordinary sand-core material, and baked to make them sufficiently hard to resist the action of the melted metal and form square ends to the pipe.

The squaring-blocks D D may have the sides of the Ilask fastened to their ends, and serve the double purpose of squaring-blocks and ends of the flask in which the pattern is molded, in which case the prints B B are dispensed with, and the flanged ends C C of the pattern come in contact with the blocks DD, which form the ends of the ii-ask.

I claim- The use and application of the squaringblocks D D and the cores f, for the purpose of squaring or finishing the ends of anged pipes and forming the bolt-holes in the process of casting the same, substantiallyas specitied.

GEORGE T. SHELDON.

In presence of- -SAML A. WATERS,

J oHN E. CRANE. 

